Surprisingly you will not find much at all regarding mil thistle and neuropathy pain. You will easily find it for the liver and things lie Hep-C treatment. A male nurse I ran into has taen it for 15+ years for his Hep-C and it is well nown for specifically the liver.
But I have yet to find any doctor, nurse, pharmasist, etc. who has even heard of it for actual diabetic foot pain. If you go to the Mayo Clinic website, it will list mill thistle for diabetic neuropathy (kidneys). That is where I found the general reference, but paid little attention due to the specific (kidney) reference, which I thought meant specifically for the kidneys, which is a very common weak for diabetics (which luckily I have no problems there).
It was due to the Lyrica nightmare I even tried milk thistle, to clear my liver of the Lyrica as soon as possible.
But literally about 6 days in, I too my normal walks, which every time I would stop, walking anywhere, I would always get the "1,000 needles" in the bottoms of both feet and had that more than 2 decades and only getting worse. I also had all the other forms of pain in my feet as well. But I immediately noticed and thought "wait a minute..where's the needles!??"
Over the next few day, ALL forms of the pain were completely gone and the only change in my entire regiment was the mil thistle.
I have continued using the milk thistle to this day and have been basically and totally pain free, with one exception. Bac in July I wound up getting Shingles, which threw my entire body chemestry out of whack and did have a few very small episodes of the neuropathy pains bac in my feet ..a dn man did that hurt! I could not believe I was living with all that pain for well over 2 decades and I was very afraid that the Shingles episode was going to change things where the milk thistle treatment was going to stop working as it has been, But, than God, it went bac to no pain and I have been pain free for about a YEAR now!
Even my primary doctor and my pain management specialist are recommending their patients try this. My pain management doctor's husban is and has been taking it since I mentioned it to her many months ago and she said he has noticed a big difference first hand as well.
So I tell everyone now, since basically no one even nows this possible and great benefit, because even the medical community does not now about it for this style pain.
Again, hope this helps.